Badawee, B. (2026) “Measuring Hydrogen Sulphide (H₂S) Gas in The Air of The Refinery And around the Refinery in Erbil – Iraq”, Journal of Knowledge Learning and Science Technology ISSN: 2959-6386 (online), 5(3), pp. 16–37. doi:10.60087/jklst.vol5.n3.002.